摘要
在临汾磁铁矿资源调查中,应用大地电磁测深法,结合已知钻孔标定、控矿环境分析以及反演断面电性等值线特征和目标层位的错动,圈定了1 400 m深度磁铁矿体的顶、底板界面和控矿断裂构造的位置。验证结果表明推断的顶、底板深度与实际深度误差分别为3.8%和0.5%,是频域电磁法在深部矿产资源勘查中应用于直接找矿比较成功的实例。表明探测深度大、对高导层(体)反映敏感的大地电磁测深法在深部及隐伏矿勘查中也是行之有效的。
The magnetite resource investigation and drilling verification in Linfen shows that the magnetotelluric sounding method has the advantage of detecting deep high-conductivity layer,and hence is effective in prospecting for deep and concealed ore deposits.With a practical example,the authors revealed the relationship between borehole data and low resistance contour lines,and delineated the top and bottom interfaces of the ore body at the depth of 1 400 m as well as the position of the ore-controlling fault.The results show that the inferred depth is consistent with borehole data,with the errors for the top and the bottom being only 3.8% and 0.5%.This is a successful example in the application of the frequency-domain electromagnetic sounding method.
出处
《物探与化探》
CAS
CSCD
北大核心
2011年第1期17-19,23,共4页
Geophysical and Geochemical Exploration
关键词
深部找矿
大地电磁测深法
磁铁矿
资料反演
ore-prospecting at depth
magnetotelluric sounding method
magnetite
data inversion
